Trolley-wheel.



No. 723.385. PATENTED MAR. 24,1903.

N. I. HAZEN. TROLL'EY WHEEL.

APPLIOATION IILED' FEB. 5. 1902.

H0 MODEL.

ATTUR Y.

UNITED STATES PATENT OFFICE.

NATHAN T. HAZEN, OF NEWBURYPORT, MASSACHUSETTS, ASSIGNOR OF ONE-FIFTH TO JOHN W. OOFFIN,'OF NEWBURYPORT, MASSACHU- SETTS.

TROLLEY-WH EEL.

SPECIFICATIbN forming part of Letters Patent No. 723,385, dated March 24, 1903.

Application filed February 6, 1902. Serial No. 92,938. (No model.) i

To all whom it may concern.-

Be it known that I, NATHAN T. HAZEN, of Newburyport,in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Trolley-Wheels, of which the following is a specification.

Figure 1 is a side view of my device, showing one arm of the trolley-guide B and the coil-spring D. Fig. 2 is a front view of my device, showing both of the guides B with their springs D. Fig. 3 is an enlarged end view of my guide B. Fig. 4 is an enlarged side View of my guide B. Fig. 5 is a sectional view of one end of my axle F. Fig.. 6 is a detail sectional view on the line 6 6 of Fig. 5, more clearly illustrating the interlocked engagement between the axle end and the cheek of the yoke.

Similar letters refer to similar parts throughout the several views.

The object of my invention is to providea means of keeping the trolley in its place 011 the trolley-wire not only when going along on a straight piece of trolley-wire, but when going over switches and under frogs. Heretofore there has been much trouble and inconvenience owing to repeated cases of thetrolley jumping from the wire, particularly when I going over switches and around'curves; but

with my device this difticultyis entirely obviated.

My device is constructed in the following manner: The yoke E, I prefer to make of brass, but do not limit myself to this material, as any suitable material may be used. The wheel A, I prefer to make of brass, but do not limit myself to this material. The guides B are made of-brass or other suitable material. The axle on which the wheel runs I prefer to make of steel or other suitable material from one end of which a segment a has been removed. The hole in one side of the yoke is not round, as at b, b'utfits the end of the axle which has a segment removed. This construction prevents the turning of the axle in the yoke E and allows the free turning of the wheel on the axle. This segment of a circle is replaced on the portion of the axle outside of the yoke E. This allows the free turning of the guides B on its axle, this construction being clearly shown in Figs. 5 and 6, E being the yoke, F the axle, and F the filling-segmeht for the removed section of the axle.

The trolley-guides heretofore described are placed on either side of the trolley-wheel, as shown in Fig. 2, and are provided with extended sleeve members S, projecting beyond both sides thereof and 'rotatably mounted on the portions of the axles fitted with the segwent-pieces F. The motion of these trolleyguides is controlled by the coiled springs D, being the same on both sides. The method of attaching these coil-springs is shown in Figs. 1 and 2. The dotted lines in Fig. 1 show the trolley-guides which have met with some obstruction, the principle being that when one of these guides meets any obstruction along the side of the wire it swings freely backward, thereby passing under the obstruction. After this obstruction has been passed the action of the spiral spring returns the guide to its former position, thereby allowing the trolley to catch the wire again. These two guides may be placed upon any trolley, and after being so placed the car is started in the ordinary manner, andwhenever any obstruction, such as a frog or. switch, is met on either side of the wire one or both of these guides swing backward and pass harmlessly under the obstruction and are automatically returned to their former upright position. These guides further render it much easier when shiftingthe trolley 'from end to end of the car to replace the wheel upon the wire.

The trolley with my device upon it may run either forward or backward, as the guides will work either way.

Having thus described my invention, what I claim as new, and desire to protect by Letters Patent, is-

1. In a trolley, the combination with the yoke and the wheel-carrying axle having its ends extended beyond the cheeks or sides of the yoke, of spring-retracted oscillatory guides arranged at opposite sides of the wheel and provided with sleeve members projecting at both sides of the plane thereof and loosely Working on the projecting ends of the axle, and springs coiled upon the sleeve portions and having their opposite ends respectively connected with the axle and the body of the retracted guides having sleeves working upon 10 guides, substantially as set forth. the projecting end portions of the axles.

2. In a trolley, the combination with the In testimony whereof I have affixed my sigwheel-yoke provided in the cheeks thereof nature in presence of two witnesses. with axle-openings having squared portions, m the wheel-carrying axle having cut-away ter- NAHAN HAZEN minal portions interlocked with the said axle- Vitnesses: openings, separate filling-segments fitted to HOWARD W. PACKER, the axle ends outside of the yoke, and spring- L. D. PHILBROOK. 

